We will look at the option but we will not be implemented for a while. If you need it right assay you can have a developer add the option using image store’s API.
For the catalog, just create a price list without any options like shipping, color, etc and add a image size with 0 price and hide or disable pages and fields that you don’t need.
For the zip download this is not an option but is easy to implement using the API, a few months ago we implemented this option for a customer